A vertical quartz furnace tube welding machine and control method thereof

Abstract

The present invention belongs to the technical field of quartz furnace tube welding equipment, and particularly relates to a vertical quartz furnace tube welding machine and a control method thereof. The machine is characterized in that it includes a base, an external welding assembly, an internal burning lamp, a quartz furnace tube clamping seat, an external welding assembly mounting seat, a fixed frame, and a movable frame. The base is provided with a fixed frame and a quartz furnace tube clamping seat, the movable frame is arranged on the inner side of the fixed frame, and the movable frame is engaged with a lifting screw via a lifting nut sleeve; the movable frame is provided with a translation seat, one end of the translation screw is connected to a translation servo motor, and a column is vertically provided on the translation seat; the top of the column is vertically connected to a cantilever via a secondary lifting adjustment mechanism, and the internal burning lamp is connected to the cantilever; the external welding assembly includes a horizontal swing seat, a vertical swing seat, an automatic wire feeding device, a quartz lamp clamping frame, and an external burning lamp clamping frame. The present invention has the advantages of being able to realize three welding functions: longitudinal linear reciprocating, transverse linear reciprocating, and compound cycloidal reciprocating.

Description

Technical Field

[0001] The invention belongs to the technical field of quartz furnace tube welding equipment, and in particular relates to a vertical quartz furnace tube welding machine and a control method thereof. Background Art

[0002] Quartz furnace tubes consist of two parts: a quartz tube and end caps or special-shaped end caps. These two parts must be sealed by welding to ensure a corrosion-resistant, high-temperature-resistant, and homogenously clean process environment during the crystal growth, ion implantation, precipitation, and annealing processes. They are widely used in the production of bulk single crystals such as gallium arsenide and indium phosphide using the vertical gradient freezing (VGF) and VB methods.

[0003] Oxyhydrogen welding, also known as an oxy-hydrogen torch, is a common gas welding method. Hydrogen and oxygen are mixed in a specific ratio and then ignited, producing a high-temperature flame. This heats the weld area, bringing the quartz welding rod to its melting point and fusing the quartz components together. Fused quartz welding is widely used in quartz processing. Traditionally, operators held the quartz welding rod in one hand and an oxyhydrogen flame heat gun in the other. The heat gun melted the quartz welding rod and then sintered it to the quartz component.

[0004] Chinese utility model patent publication number CN208136074U discloses a quartz tube flange welding device, which includes a bed load-bearing platform, a column placed on the bed load-bearing platform, and a work base. A hot air mechanism is provided at the bottom of the work base, and a rotary platform that moves up and down along the column, a rotary platform lifting mechanism, and a heating gun auxiliary heating mechanism are provided on the column. The heating gun auxiliary heating mechanism is provided with a heating gun. This scheme uses the work base as a positioning platform for the quartz flange and the quartz inner tube, and uses a liftable rotary platform to clamp, position, and rotate the quartz outer tube. The quartz flange and quartz inner tube are continuously heated by the heating mechanism, and the quartz outer tube is automatically flame heated by the heating gun that can move up and down, ensuring that the quartz tube and quartz flange maintain a certain temperature during the welding and assembly of the quartz product.

[0005] The shortcomings of this welding device are: it only has one external welding component and is only suitable for welding small-diameter quartz tubes. The heating gun only has two degrees of freedom: lifting and swinging, which makes it unsuitable for welding the internal and external welds of large thick-walled quartz tubes or more complex welds. Summary of the Invention

[0006] The purpose of the present invention is to provide a vertical quartz furnace tube welding machine and a control method thereof, which overcomes the shortcomings of the existing technology. The machine adopts the combined application of an internal burning lamp and an external welding assembly, which respectively act on the inner and outer sides of the quartz furnace tube and the rear side of the welding rod, so that the quartz furnace tube can achieve synchronous heating and weld fusion to complete welding. The internal burning lamp can move in three directions: X-axis, Y-axis, and Z-axis. In addition to moving in three directions: X-axis, Y-axis, and Z-axis, the external welding assembly can also swing up and down within a range of ±15°. A heat preservation arm is also provided, which sprays hydrogen flame to maintain the temperature of the tube body, thereby improving the degree of automation.

[0007] To achieve the above object, the present invention is implemented through the following technical solutions:

[0008] One of the technical solutions: A vertical quartz furnace tube welding machine, characterized in that it includes a base, an external welding component, an internal burning lamp, a quartz furnace tube clamping seat, an external welding component mounting seat, a fixed frame and a movable frame, wherein: the fixed frame and the quartz furnace tube clamping seat are provided on the base, the movable frame is arranged on the inner side of the fixed frame, the movable frame can move vertically relative to the fixed frame, the movable frame has a translation seat, the translation seat can move horizontally relative to the fixed frame, and a column is provided on the translation seat, the column can move vertically or horizontally relative to the fixed frame; the top of the column is vertically connected to the cantilever through a secondary lifting adjustment mechanism, and the internal burning lamp is connected to the cantilever. The arms are connected; the bottom of the movable frame is connected to the external welding component translation frame, the bottom of the movable frame is connected to the external welding component translation frame through the external welding component translation slide rail, the external welding component translation screw, and the external welding component screw nut sleeve, and the external welding component translation frame is connected to the external welding component mounting seat through a hollow tube; the external welding assembly includes a horizontal swing seat, a vertical swing seat, an automatic wire feeding device, a quartz lamp clamping frame and an external burning lamp clamping frame, the horizontal swing seat is located at the bottom, and the vertical swing seat and the automatic wire feeding device are connected thereto in sequence, the automatic wire feeding device shell is respectively connected to the external burning lamp clamping frame and the quartz lamp clamping frame, the external burning lamp is connected to the external burning lamp clamping frame, and the quartz lamp clamping frame is connected to the quartz lamp.

[0009] Furthermore, an outward-extending slide is provided between the inner burning lamp and the cantilever, and the outward-extending slide is connected to the cantilever through an outward-extending nut sleeve, an outward-extending lead screw, an outward-extending slide rail, and the outward-extending slide is downwardly connected to the inner burning lamp mounting plate, and an inner burning lamp air supply pipe is fixed to the inner burning lamp mounting plate, and the bottom of the inner burning lamp air supply pipe is connected to the inner burning lamp nozzle, and the end of the outward-extending lead screw is connected to the outward-extending servo motor; the movable frame is connected to the lifting lead screw provided on the fixed frame through the lifting nut sleeve, and the movable frame and the fixed frame are also connected through the lifting slide rail, and a lifting servo motor is provided on the fixed frame, and the lifting motor is connected to the lifting lead screw, and the movable frame is engaged with the lifting lead screw through the lifting nut sleeve;

[0010] The translation seat of the movable frame is connected to the translation screw arranged at the bottom of the movable frame through a translation nut sleeve. The translation seat and the bottom of the movable frame are also connected through a translation slide rail. One end of the translation screw is connected to the translation servo motor.

[0011] Furthermore, the external burning lamp clamping frame includes a two-dimensional adjustment frame and an external burning lamp connecting frame, and the external burning lamp is connected to the external burning lamp connecting frame; the quartz lamp clamping frame includes a quartz lamp swinging device, a quartz lamp moving device and a quartz lamp mounting frame, and the quartz lamp swinging device is connected to the quartz lamp moving device and the quartz lamp mounting frame in sequence, and the quartz lamp is mounted on the quartz lamp mounting frame.

[0012] Furthermore, the external welding component translation frame is connected to the external welding component mounting seat through a hollow tube. The inside of the hollow tube is a cable channel, and the hollow tube wall is provided with openings for convenient wiring.

[0013] Furthermore, the quartz furnace tube clamping seat includes a machine tool chuck assembly, a chuck seat and a rotary drive mechanism. The chuck seat is fixedly arranged on the base. The machine tool chuck assembly is connected to the chuck seat through a bearing. The base is connected to the machine tool chuck assembly through a rotary drive mechanism. The machine tool chuck assembly can rotate around its own central axis.

[0014] Furthermore, the horizontal swing seat and / or vertical swing seat and / or quartz lamp swing device has a swing range of ±15°, and is an electric swing drive or a pneumatic swing drive.

[0015] Furthermore, one side of the fixed frame is provided with one or two heat preservation arms, the heat preservation arms are multi-section hinged structures, and a combustion nozzle is provided at the front end; a locking positioning pin is provided at the hinged connection.

[0016] Furthermore, the upper and lower ends of the lifting rails are respectively provided with limit switches; the lifting rails are all located on the outside of the fixed frame, and the movable frame is connected to the lifting rails through an inner buckle plate.

[0017] Furthermore, the secondary lifting adjustment mechanism includes a secondary lifting slide, a secondary lifting nut sleeve, a secondary lifting slide rail, and a secondary lifting screw. The cantilever is connected to the secondary lifting slide, and the secondary lifting slide is connected to the secondary lifting screw through the secondary lifting nut sleeve. The column and the secondary lifting slide are connected through the secondary lifting slide rail. The pitch ratio of the lifting screw and the secondary lifting screw is 1:0.3-1.

[0018] Technical solution 2: A control method for a vertical quartz furnace tube welding machine, characterized in that the welding of the quartz furnace tube weld is completed by controlling the movement trajectory of the outer burning lamp, the inner burning lamp, the welding wire and the quartz lamp, which specifically includes three actions: 1) the outer burning lamp, the inner burning lamp, the welding wire and the quartz lamp are synchronously raised and lowered with the movable frame, and the burning points of the outer burning lamp and the inner burning lamp are correspondingly set relative to the inside and outside of the weld; 2) the outer burning lamp moves back and forth within the range of the maximum threshold and the minimum threshold at a vertical distance relative to the welding wire, uniformly heating the weld, and the outer burning lamp moves back and forth within the range of the maximum threshold and the minimum threshold, uniformly heating the weld, and uniformly heating the weld. The lamp accelerates back at the maximum threshold and the minimum threshold, moves at a constant speed between the maximum threshold and the minimum threshold, and cycles until welding is completed; 3) the quartz lamp swings left and right relative to the welding rod under the control of the quartz lamp swinging device. When it swings to the left, the external burning lamp moves to the right under the control of the two-dimensional adjustment frame, so that the external burning lamp, welding wire and quartz lamp are always in a straight line. Similarly, when the quartz lamp swings to the right, the external burning lamp moves to the left under the control of the two-dimensional adjustment frame, so that the external burning lamp, welding wire and quartz lamp are still always in a straight line, and the swing return point is centered.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The combination of internal burning lamp and external welding components acts on the inner and outer sides of the quartz furnace tube respectively, so that the quartz furnace tube can achieve synchronous heating and complete welding. It is particularly suitable for large quartz furnace tubes with a wall thickness of less than 5mm. The welding speed is about 0-100mm per minute.

[0021] The internal burning lamp can move in three directions: X-axis, Y-axis, and Z-axis. In addition to the movement in three directions: X-axis, Y-axis, and Z-axis, the external welding assembly can also swing left and right and up and down within the range of ±15°. The degree of automation is significantly improved, the control accuracy is higher, and it is conducive to improving welding efficiency.

[0022] It is also equipped with a heat preservation arm to keep the quartz furnace tube body at a constant temperature, thus improving the appearance and quality of the weld formation;

[0023] In the field of quartz furnace tube production, it used to require three senior quartz lamp operators to complete the product: one person held the welding rod lamp, applying the extremely difficult wire welding or push welding techniques, and the other two highly skilled quartz lamp operators holding the internal and external burner lamps, working in close coordination. The personnel worked in an environment with extremely high thermal radiation, which caused a significant loss of water and physical strength. The safety of the product was greatly affected by the human emotions and state during work, and it was easy to cause cracks. However, using the vertical quartz furnace tube welding machine of the present invention, at least one quartz lamp operator who has received about a week of training can complete the work of the original three senior quartz lamp operators, while improving the stability of the equipment and forming uniform and beautiful welds. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1This is a schematic diagram of a three-dimensional viewing angle structure of an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the second stereoscopic viewing angle structure of an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the third structure of a stereoscopic viewing angle according to an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the fourth structure of a stereoscopic viewing angle according to an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the main structure of an embodiment of the present invention;

[0029] Figure 6 for Figure 5 Rear view;

[0030] Figure 7 for Figure 5 Left view of;

[0031] Figure 8 for Figure 5 Right view;

[0032] Figure 9 for Figure 6 A top view of

[0033] Figure 10 for Figure 6 Bottom view of

[0034] Figure 11 for Figure 3 Enlarged view of point A.

[0035] Figure 12 for Figure 5 BB cross-sectional view;

[0036] Figure 13 for Figure 5 CC cross-sectional view;

[0037] Figure 14 for Figure 5 DD cross-sectional view;

[0038] Figure 15 for Figure 5 EE cross-sectional view;

[0039] Figure 16 This is a schematic diagram of the structure of the internal and external welding assembly mounting base in an embodiment of the present invention;

[0040] Figure 17 for Figure 15 F-direction view;

[0041] Figure 18 for Figure 15 G-direction view;

[0042] Figure 19 Schematic diagram of the swing trajectory of the external burning lamp and the quartz lamp relative to the welding wire in an embodiment of the present invention;

[0043] Figure 20 Schematic diagram of the straight trajectory of the external burning lamp, quartz lamp and welding wire in an embodiment of the present invention.

[0044] In the figure: 1-base; 2-external welding assembly; 3-internal burning lamp; 4-quartz furnace tube clamping seat; 5-external welding assembly mounting seat; 6-fixed frame; 7-movable frame; 8-lifting nut sleeve; 9-lifting screw; 10-lifting slide rail; 11-lifting servo motor; 12-translation seat; 13-translation nut sleeve; 14-translation screw; 15-translation slide rail; 16-translation servo motor; 17-column; 18-cantilever; 19-external welding assembly translation frame; 20-external welding assembly translation slide rail; 21-external welding assembly translation screw; 22-external welding assembly translation motor; 23-hollow tube; 24-horizontal swing seat; 25-vertical swing seat; 26-automatic wire feeding device; 27-quartz lamp clamping frame; 28-external burning lamp clamping frame; 29-external burning lamp; 30-quartz lamp; 31-external extension slide; 32-external extension nut sleeve; 33-Extended lead screw; 34-Extended slide rail; 35-Inner burning lamp mounting plate; 36-Inner burning lamp air supply pipe; 37-Extended servo motor; 38-Quartz lamp swing device; 39-Machine tool chuck assembly; 40-Chuck seat; 41-Rotary drive mechanism; 42-Bearing; 43-Insulation arm; 44-Locking positioning pin; 45-Limit switch; 46-Inner buckle plate; 47-Secondary lifting adjustment mechanism; 48-Two-dimensional adjustment frame; 49-Secondary lifting nut sleeve; 50-Secondary lifting slide rail; 51-Secondary lifting lead screw; 52-Quartz furnace tube; 53-Welding wire; 54-External welding assembly longitudinal movement frame; 55-External welding assembly longitudinal movement lead screw; 56-External welding assembly longitudinal movement slide rail; 57-External welding assembly longitudinal movement servo motor; 58-Secondary lifting slide seat; 59-External burning lamp connecting frame; 60-Quartz lamp moving device; 61-Quartz lamp mounting frame. DETAILED DESCRIPTION

[0045] The technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0046] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the specific embodiments required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the specific embodiments described below are some implementation methods of the present invention. For ordinary technicians in this field, other specific embodiments can be obtained based on these specific embodiments without paying any creative work.

[0047] The components of the embodiments of the present invention generally described and shown in the specific embodiments herein can be arranged and designed in countless different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the specific embodiments is not intended to limit the scope of the claimed invention, but rather represents only selected embodiments of the present invention.

[0048] See Figure 1-14 , which is a structural schematic diagram of an embodiment of a vertical quartz furnace tube welding machine of the present invention, including a base 1, an external welding assembly 2, an internal burning lamp 3, a quartz furnace tube clamping seat 4, an external welding assembly mounting seat 5, a fixed frame 6 and a movable frame 7, wherein: the base 1 is provided with a fixed frame 6 and a quartz furnace tube clamping seat 4, and the movable frame 7 is arranged on the inner side of the fixed frame 6, wherein the base 1 is provided with a fixed frame 6 and a quartz furnace tube clamping seat 4, and the movable frame 7 is arranged on the inner side of the fixed frame 6, and the movable frame 7 can move vertically relative to the fixed frame 6, and the movable frame 7 has a translation seat 12, and the translation seat 12 can move horizontally relative to the fixed frame 6, and the translation seat is provided with a column 17, and the column 17 can move vertically or horizontally relative to the fixed frame 6;

[0049] The top of the column 17 is vertically connected to the cantilever 18 through the secondary lifting adjustment mechanism 47, and the inner burning lamp 3 is connected to the cantilever 18. The effect of the inner burning lamp 3 is to heat the inner wall of the quartz furnace tube 52, and the combustion medium is hydrogen.

[0050] An external welding assembly translation frame 19 is provided at the bottom of the movable frame 7. The bottom of the movable frame 7 is connected to the external welding assembly translation frame 19 via an external welding assembly translation screw nut sleeve, an external welding assembly translation screw 21, and an external welding assembly translation motor 22. The bottom of the movable frame 7 is also connected to the external welding assembly translation frame 19 via an external welding assembly translation rail 20. The external welding assembly translation frame 19 is connected to the external welding assembly mounting seat 5 via a hollow tube 23. An external welding assembly longitudinal slide rail 56 and an external welding assembly longitudinal screw 55 are connected between the external welding assembly translation frame 19 and the external welding assembly longitudinal frame 54. One end of the external welding assembly longitudinal screw 55 is connected to the external welding assembly longitudinal servo motor 56 to achieve two-dimensional position adjustment of the external welding assembly 2.

[0051] The external welding assembly 2 includes a horizontal swing seat 24, a vertical swing seat 25, an automatic wire feeding device 26, a quartz lamp clamping frame 27 and an external burning lamp clamping frame 28. The horizontal swing seat 24 is located at the bottom, and the vertical swing seat 25 and the automatic wire feeding device 26 are connected to it in sequence. The outer shell of the automatic wire feeding device 26 is respectively connected to the external burning lamp clamping frame 28 and the quartz lamp clamping frame 27. The external burning lamp clamping frame 28 is connected to the external burning lamp 29, and the quartz lamp clamping frame 27 is connected to the quartz lamp 30.

[0052] An outward slide 31 is provided between the inner burning lamp 3 and the cantilever 18. The outward slide 31 is connected to the cantilever 18 through an outward nut sleeve 32, an outward screw 33, an outward slide rail 34, and the outward slide 31 is downwardly connected to the inner burning lamp mounting plate 35. An inner burning lamp air supply pipe 36 is fixed on the inner burning lamp mounting plate 35. The bottom of the inner burning lamp air supply pipe 36 is connected to the inner burning lamp nozzle, and the end of the outward screw 33 is connected to the outward servo motor 37; the movable frame 7 is connected to the lifting screw 9 provided on the fixed frame 6 through the lifting nut sleeve 8, and the movable frame 7 and the fixed frame 6 are also connected through the lifting slide rail 10. A lifting servo motor 11 is provided on the fixed frame 6, and the lifting servo motor 11 is connected to one end of the lifting screw 9. The movable frame 7 is engaged with the lifting screw 9 through the lifting nut sleeve 8.

[0053] A translation seat 12 is provided on the movable frame 7, and the translation seat 12 is connected to a translation screw 14 provided at the bottom of the movable frame 7 through a translation nut sleeve 13. The translation seat 12 and the bottom of the movable frame 7 are also connected through a translation rail 15. One end of the translation screw 14 is connected to a translation servo motor 16, and a column 17 is vertically provided on the translation seat 12.

[0054] The external lamp holder 28 comprises a two-dimensional adjustment frame 48 and an external lamp connection frame 59, to which the external lamp 29 is connected. The quartz lamp holder 27 comprises a quartz lamp swing mechanism 38, a quartz lamp moving mechanism 60, and a quartz lamp mounting frame 61. The quartz lamp swing mechanism 38 is in turn connected to the quartz lamp moving mechanism 60 and the quartz lamp mounting frame 61, to which the quartz lamp 30 is mounted. The quartz lamp moving mechanism 60 also comprises a screw and nut drive mechanism, which allows the quartz lamp to move back and forth, adjusting its distance relative to the quartz furnace tube 52. The external lamp 29 heats the weld seam of the quartz furnace tube 52, while the quartz lamp 30 heats the welding wire 53, causing it to melt. The combustion medium of the external lamp 29 is a mixture of oxygen and acetylene.

[0055] The external welding assembly translation frame 19 is connected to the external welding assembly mounting base 5 through a hollow tube 23. The inside of the hollow tube 23 is a cable channel, and the wall of the hollow tube 23 is provided with openings for convenient wiring.

[0056] The quartz furnace tube clamping seat 4 includes a machine tool chuck assembly 39, a chuck seat 40 and a rotation drive mechanism 41. The chuck seat 40 is fixedly set on the base 1. The machine tool chuck assembly 39 is connected to the chuck seat 40 through a bearing 42. The base 1 is connected to the machine tool chuck assembly 39 through the rotation drive mechanism 41. The machine tool chuck assembly 39 can rotate around its own central axis.

[0057] The swing ranges of the horizontal swing base 24, the vertical swing base 25 and the quartz lamp swing device 38 are all ±15°, and commercially available electric swing drives or pneumatic swing drives can be used.

[0058] Two insulation arms 43 are provided on one side of the fixed frame 6. The insulation arm 43 is a multi-section hinged structure, and a combustion nozzle is provided at the front end to spray hydrogen flame to maintain the temperature. A locking positioning pin 44 is provided at the hinged connection to facilitate fixing the posture of the insulation arm.

[0059] Limit switches 45 are respectively provided at the upper and lower ends of the lifting slide rail 10; the lifting slide rails 10 are all located on the outside of the fixed frame 6, and the movable frame 7 is connected to the lifting slide rail 10 through an inner buckle plate 46. In order to balance the weight of the column 17 and the cantilever 18, two rows of inner buckle plates 46 are provided on the side of the movable frame 7 away from the column.

[0060] The secondary lift adjustment mechanism 47 includes a secondary lift slide 58, a secondary lift nut sleeve 49, a secondary lift rail 50, and a secondary lift screw 51. The cantilever 18 is connected to the secondary lift slide 58, which is connected to the secondary lift screw 51 via the secondary lift nut sleeve 49. The column 17 and the secondary lift slide 58 are connected via the secondary lift rail 50. The pitch ratio of the lift screw 9 and the secondary lift screw 51 is 1:0.3-1. The lift screw 9 enables rapid lifting of the cantilever, while the secondary lift screw 51 enables precise and slow lifting of the cantilever, improving the adjustment efficiency and precision of the internal burner lamp 3.

[0061] The specific embodiments of the present invention are merely illustrative, but are not limited to applications to quartz furnace tubes with other wall thicknesses. The device can also weld quartz furnace tubes 52 with other wall thicknesses by adjusting the welding speed accordingly.

[0062] When the embodiment of the present invention is working, the quartz furnace tube 52 is first clamped to the machine tool chuck assembly 39 to ensure that the quartz furnace tube 52 is stable and easy to operate to meet the welding requirements. The exact position of the weldment on the quartz furnace tube 52 can be determined by measuring tools, positioning templates and other auxiliary means for precise positioning to ensure the accuracy and consistency of the welding position. Control the movement of the inner burning lamp 3, and place the inner burning lamp 3 in the quartz furnace tube 52 by moving in three directions of lifting, left and right, and front and back, corresponding to the inside of the weld. Then control the movement of the outer welding assembly 2, and move it in three directions of lifting, front and back, and left and right, so that it corresponds to the outside of the weld of the quartz furnace tube 52. Select a welding wire of 2-6mm, preferably 4mm, pass the welding wire 53 through the outer welding assembly 2, and lead it out from the front end. Adjust the relative position and distance between the outer burning lamp 29 on the outer welding assembly 2 and the welding wire 53 to achieve the best baking effect. During welding, the weld is processed from top to bottom, and the outer welding assembly 2 and the inner burning lamp 3 are always in synchronous motion. For the same part, the welding order is also from top to bottom, and the welding speed is about 100 mm per minute.

[0063] The control method of the embodiment of the present invention is to complete the welding of the weld seam of the quartz furnace tube 52 by controlling the movement trajectory of the outer burning lamp 29, the inner burning lamp 3, the welding wire 53 and the quartz lamp 30. The specific three actions are: 1) the outer burning lamp 29, the inner burning lamp 3, the welding wire 53 and the quartz lamp 30 are synchronously raised and lowered with the movable frame 7, and the combustion points of the outer burning lamp 29 and the inner burning lamp 3 are correspondingly set relative to the inside and outside of the weld seam, and the weld seam is baked synchronously; 2) the outer burning lamp 29 moves back and forth within the vertical distance of 25mm-100mm relative to the welding wire 53 to uniformly heat the weld seam, and the outer burning lamp 29 moves between the maximum threshold and the minimum threshold. 3) The quartz lamp 30, under the control of the quartz lamp oscillating device 38, oscillates left and right relative to the welding rod. When it oscillates left, the external burner lamp 29, under the control of the two-dimensional adjustment frame 48, moves rightward, ensuring that the external burner lamp 29, welding wire 53, and quartz lamp 30 are always aligned. Similarly, when the quartz lamp 30 oscillates right, the external burner lamp 29, under the control of the two-dimensional adjustment frame 48, moves leftward, ensuring that the external burner lamp 29, welding wire 53, and quartz lamp 30 are always aligned, with the swing return point centered. The swing cycle is 4 seconds. The welding wire in this embodiment of the present invention can produce straight reciprocating, zigzag, or oblique circular welds, adapting to various application needs. Specifically, when the welding wire adopts a straight reciprocating welding trace, it takes 38.3 hours from the start of welding the raw materials to the completion of welding the quartz furnace tube 52 using the existing welding method, while it only takes 27 hours using the vertical quartz furnace tube welding machine of the present invention, which saves 29.5% of the welding time compared with the existing welding method. In addition, the existing welding method requires a total of 69 hours of manual labor, while the vertical quartz furnace tube welding machine of the present invention requires 32.67 hours of manual labor, which saves 52.6% of the manual labor time used in the existing welding method. It can be seen that in the field of quartz furnace tube production, it used to require three senior quartz lamp workers to complete the product: one person holds the welding rod lamp and applies the extremely difficult wire turning welding or push welding technique, and the other two highly skilled quartz lamp workers who hold the internal and external burn-out lamps work in harmony. The workers work in an environment with extremely high heat radiation, consume a lot of water, and their physical strength decreases very quickly. During work, the safety of the product is greatly affected by the human emotions and state, and it is easy to explode. By using the vertical quartz furnace tube welding machine of the present invention, at least one quartz lamp operator who has been trained for about one week can accomplish the work of three senior quartz lamp operators, and the stability of the equipment and the uniform and beautiful welds are achieved.

[0064] During welding, for quartz furnace tubes 52 with a wall thickness of less than 0.2-1mm, the outer burner lamp 29 and the inner burner lamp 3 are positioned opposite each other, with welding performed on the same portion of the quartz furnace tube 52. For quartz furnace tubes 52 with a wall thickness greater than 1mm and no greater than 2mm, both the outer burner lamp 29 and the quartz lamp 30 are required to be heated simultaneously. Simultaneously, the longitudinal motor on the two-dimensional adjustment frame 48 controls the outer burner lamp 29 to move back and forth within a range of 25-100mm, and this cycle continues until welding is complete.

[0065] For the quartz furnace tube 52 with a wall thickness in the range of 2-5mm, the outer burning lamp 29 and the quartz lamp 30 need to be baked at the same time, and the horizontal swing seat 24 is controlled to rotate so that the quartz lamp 30 swings back and forth at an angle of ±15° and returns to its original position every 4 seconds, with the middle being the return position. The swinging process can expand the range of baking and heating. During the swinging process, the outer burning lamp 29, the welding wire and the inner burning lamp 3 are always in a straight line, that is, the welding wire does not move, and the outer burning lamp 29 and the inner burning lamp 3 swing left and right.

[0066] When preheating the welded area of ​​the quartz furnace tube 52 and the welded parts using an external burner 29, the quartz furnace tube 52 is generally heated to approximately 300°C-600°C. The specific temperature depends on the material, size, and welding requirements of the quartz furnace tube 52. Preheating ensures uniform heating of the quartz furnace tube 52 and the welded parts, reducing welding stress. A suitable heat source, such as an oxyhydrogen flame, is used to heat the quartz furnace tube 52 and the welded parts until the welded area is molten. A welding rod is then added to the molten area to fill the weld seam and form a good welded joint. During the welding process, parameters such as the heating temperature, time, and flame size and direction must be carefully controlled to ensure weld quality. For example, for large-diameter quartz furnace tubes 52, simultaneous internal and external heating can be used to improve welding precision and yield.

[0067] After welding is complete, allow the quartz furnace tube 52 to cool naturally to room temperature, or use appropriate cooling methods such as air cooling or water cooling as needed. However, be careful not to cool too quickly to avoid generating new stress and cracks. Inspect and clean the welded area to remove excess welding rod, oxides, and other impurities. Then, test the weld quality using nondestructive testing methods such as ultrasonic testing and X-ray testing to ensure the weld joint is free of defects. If any problems are found, repair or re-weld promptly.

[0068] During welding, the outer welding assembly 2 can swing horizontally and vertically within ±10°, returning to its home position every four seconds, with the center of the assembly as the home position. The combustible gas flow rate for the outer burner lamp 29, quartz lamp 30, and inner burner lamp 3 is 55 nL / min. After all welds are completed, the inner burner lamp 3 and outer welding assembly 2 are reset.

[0069] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A vertical quartz furnace tube welding machine, characterized in that, It includes a base, an external welding component, an internal burning lamp, a quartz furnace tube clamping seat, an external welding component mounting seat, a fixed frame and a movable frame, wherein: The base is provided with the fixed frame and the quartz furnace tube clamping seat, the movable frame is provided on the inner side of the fixed frame, the movable frame can move vertically relative to the fixed frame, the movable frame has a translation seat, the translation seat can move horizontally relative to the fixed frame, and the translation seat is provided with a column, the column can move vertically or horizontally relative to the fixed frame; The top of the column is vertically connected to the cantilever through a secondary lifting and adjusting mechanism, and the internal burning lamp is connected to the cantilever; The bottom of the movable frame is connected to the external welding component translation frame, the bottom of the movable frame and the external welding component translation frame are connected through the external welding component translation rail, the external welding component translation screw, and the external welding component screw nut sleeve, and the external welding component translation frame is connected to the external welding component mounting seat through a hollow tube; The external welding assembly includes a horizontal swing seat, a vertical swing seat, an automatic wire feeding device, a quartz lamp clamping frame and an external burning lamp clamping frame. The horizontal swing seat is located at the bottom, and the vertical swing seat and the automatic wire feeding device are connected to it in sequence. The housing of the automatic wire feeding device is respectively connected to the external burning lamp clamping frame and the quartz lamp clamping frame. The external burning lamp clamping frame is connected to the external burning lamp, and the quartz lamp clamping frame is connected to the quartz lamp. An outward-extending slide is provided between the inner burning lamp and the cantilever, and the outward-extending slide is connected to the cantilever through an outward-extending nut sleeve, an outward-extending lead screw, an outward-extending slide rail, and the outward-extending slide is downwardly connected to the inner burning lamp mounting plate, and an inner burning lamp air supply pipe is fixed to the inner burning lamp mounting plate, and the bottom of the inner burning lamp air supply pipe is connected to the inner burning lamp nozzle, and the end of the outward-extending lead screw is connected to the outward-extending servo motor; The movable frame is connected to the lifting screw provided on the fixed frame through a lifting nut sleeve, and the movable frame and the fixed frame are further connected through a lifting slide rail. The fixed frame is provided with a lifting servo motor, the lifting motor is connected to the lifting screw, and the movable frame is engaged with the lifting screw through the lifting nut sleeve; The translation seat of the movable frame is connected to the translation screw provided at the bottom of the movable frame through a translation nut sleeve. The translation seat and the bottom of the movable frame are also connected through a translation slide rail. One end of the translation screw is connected to the translation servo motor. The external burning lamp clamping frame includes a two-dimensional adjustment frame and an external burning lamp connecting frame, and the external burning lamp connecting frame is connected to the external burning lamp; the quartz lamp clamping frame includes a quartz lamp swinging device, a quartz lamp moving device and a quartz lamp mounting frame, and the quartz lamp swinging device is sequentially connected to the quartz lamp moving device and the quartz lamp mounting frame, and the quartz lamp is mounted on the quartz lamp mounting frame; The swing range of the horizontal swing seat and / or the vertical swing seat and / or the quartz lamp swing device is ±15°, and the device is an electric swing drive or a pneumatic swing drive.

2. A vertical quartz furnace tube welding machine according to claim 1, characterized in that: The external welding component translation frame is connected to the external welding component mounting seat through a hollow tube. The inside of the hollow tube is a cable channel, and the hollow tube wall is provided with openings for convenient wiring.

3. A vertical quartz furnace tube welding machine according to claim 1, characterized in that: The quartz furnace tube clamping seat includes a machine tool chuck assembly, a chuck seat and a rotary drive mechanism. The chuck seat is fixedly arranged on the base. The machine tool chuck assembly is connected to the chuck seat through a bearing. The base is connected to the machine tool chuck assembly through the rotary drive mechanism. The machine tool chuck assembly can rotate around its own central axis.

4. A vertical quartz furnace tube welding machine according to claim 1, characterized in that: One side of the fixed frame is provided with one or two heat preservation arms, the heat preservation arms are multi-section hinged structures, and a combustion nozzle is provided at the front end thereof; a locking positioning pin is provided at the hinged connection.

5. A vertical quartz furnace tube welding machine according to claim 1, characterized in that: The upper and lower ends of the lifting slide rails are respectively provided with limit switches; the lifting slide rails are all located outside the fixed frame, and the movable frame is connected to the lifting slide rails through an inner buckle plate.

6. A vertical quartz furnace tube welding machine according to claim 1, characterized in that: The secondary lifting adjustment mechanism includes a secondary lifting slide, a secondary lifting nut sleeve, a secondary lifting slide rail, and a secondary lifting screw. The cantilever is connected to the secondary lifting slide, and the secondary lifting slide is connected to the secondary lifting screw through the secondary lifting nut sleeve. The column and the secondary lifting slide are connected through the secondary lifting slide rail. The pitch ratio of the lifting screw and the secondary lifting screw is 1:0.3-1.

7. A control method for a vertical quartz furnace tube welding machine according to any one of claims 1 to 6, characterized in that: The welding of the quartz furnace tube weld is completed by controlling the movement trajectory of the outer burner lamp, inner burner lamp, welding wire and quartz lamp, which specifically includes three actions: 1) the outer burner lamp, inner burner lamp, welding wire and quartz lamp are synchronously raised and lowered with the movable frame, and the combustion points of the outer burner lamp and the inner burner lamp are correspondingly set relative to the inside and outside of the weld; 2) the outer burner lamp moves back and forth within the range of the maximum threshold and the minimum threshold at a vertical distance relative to the welding wire to uniformly heat the weld, and the outer burner lamp accelerates and returns at the maximum threshold and the minimum threshold, and moves at a constant speed between the maximum threshold and the minimum threshold, and repeats until the welding is completed; 3) the quartz lamp is controlled by the quartz lamp swing device to swing left and right relative to the welding rod. When it swings to the left, the outer burner lamp moves to the right under the control of the two-dimensional adjustment frame, so that the outer burner lamp, welding wire and quartz lamp are always in a straight line. Similarly, when the quartz lamp swings to the right, the outer burner lamp moves to the left under the control of the two-dimensional adjustment frame, so that the outer burner lamp, welding wire and quartz lamp are still always in a straight line, and the swing return point is centered.

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